/* ============================================
   Humble Builder Faisalabad - Main Stylesheet
   ============================================ */

/* ===== CSS Variables ===== */
:root {
    --primary-color: #0A2463;
    --secondary-color: #2E4057;
    --accent-gold: #D4AF37;
    --accent-orange: #C44900;
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --dark-gray: #495057;
    --border-radius: 4px;
    --spacing-unit: 8px;
    --transition: all 0.3s ease;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Open Sans', sans-serif;
    font-weight: 400;
    line-height: 1.6;
    color: var(--secondary-color);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Ensure navigation is visible on desktop */
nav {
    display: block;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    line-height: 1.3;
    color: var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--dark-gray);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--accent-orange);
}

a:focus {
    outline: 2px solid var(--accent-gold);
    outline-offset: 2px;
}

/* ===== Container & Layout ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 2);
}

.section {
    padding: calc(var(--spacing-unit) * 10) 0;
}

.section:first-of-type {
    padding-top: calc(var(--spacing-unit) * 8);
}

.section-title {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 6);
}

.section-title p {
    max-width: 700px;
    margin: calc(var(--spacing-unit) * 2) auto 0;
    font-size: 1.1rem;
    color: var(--dark-gray);
}

.section-title h2 {
    position: relative;
    display: inline-block;
    padding-bottom: calc(var(--spacing-unit) * 2);
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent-gold);
}

/* ===== Header & Navigation ===== */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
    width: 100%;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit) * 2);
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    font-family: 'Montserrat', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo a {
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
}

.logo img {
    height: 50px;
    margin-right: calc(var(--spacing-unit) * 1);
}

nav ul {
    display: flex;
    list-style: none;
    gap: calc(var(--spacing-unit) * 2);
    margin: 0;
    padding: 0;
    align-items: center;
}

nav ul li {
    list-style: none;
    margin: 0;
}

nav ul li a {
    font-weight: 500;
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2.5);
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: block;
    text-decoration: none;
    color: var(--primary-color);
}

nav ul li a:hover,
nav ul li a.active {
    background-color: var(--primary-color);
    color: var(--white);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../images/hero/construction-site.jpg');
    background-size: cover;
    background-position: center;
    background-color: var(--primary-color);
    background-repeat: no-repeat;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 36, 99, 0.8);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    max-width: 800px;
    padding: calc(var(--spacing-unit) * 4);
}

.hero-content h1 {
    font-size: 3.5rem;
    color: var(--white);
    margin-bottom: calc(var(--spacing-unit) * 3);
    animation: fadeInUp 1s ease;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    font-weight: 700;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--white);
    margin-bottom: calc(var(--spacing-unit) * 4);
    animation: fadeInUp 1s ease 0.2s both;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.4s both;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    font-family: 'Montserrat', sans-serif;
}

.btn-primary {
    background-color: var(--accent-gold);
    color: var(--primary-color);
    border-color: var(--accent-gold);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

.btn-primary:hover {
    background-color: var(--accent-orange);
    border-color: var(--accent-orange);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border-color: var(--white);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

.btn-secondary:hover {
    background-color: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* ===== Services Grid ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
    margin-top: calc(var(--spacing-unit) * 4);
}

.service-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 5);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto calc(var(--spacing-unit) * 3);
    background: linear-gradient(135deg, var(--light-gray) 0%, #e9ecef 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--accent-gold);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 4px 12px rgba(212, 175, 55, 0.3);
}

.service-card h3 {
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--primary-color);
    font-size: 1.5rem;
}

.service-card p {
    flex-grow: 1;
    margin-bottom: calc(var(--spacing-unit) * 3);
    color: var(--dark-gray);
    line-height: 1.7;
}

.service-card .btn {
    margin-top: auto;
    align-self: center;
    width: auto;
    min-width: 150px;
}

/* ===== Portfolio Gallery ===== */
.portfolio-filter {
    display: flex;
    justify-content: center;
    gap: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 4);
    flex-wrap: wrap;
}

.filter-btn {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
    background-color: var(--light-gray);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--primary-color);
    color: var(--white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    cursor: pointer;
}

.portfolio-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(10, 36, 99, 0.9), transparent);
    display: flex;
    align-items: flex-end;
    padding: calc(var(--spacing-unit) * 3);
    opacity: 0;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay h3 {
    color: var(--white);
    margin: 0;
}

/* ===== Testimonials ===== */
.testimonials-slider {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.testimonial-card {
    background-color: var(--white);
    padding: calc(var(--spacing-unit) * 5);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.testimonial-stars {
    color: var(--accent-gold);
    font-size: 1.5rem;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.testimonial-text {
    font-style: italic;
    font-size: 1.1rem;
    margin-bottom: calc(var(--spacing-unit) * 3);
    color: var(--dark-gray);
}

.testimonial-author {
    font-weight: 600;
    color: var(--primary-color);
}

.testimonial-company {
    color: var(--dark-gray);
    font-size: 0.9rem;
}

.slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
    z-index: 10;
}

.slider-nav:hover {
    background-color: var(--accent-orange);
}

.slider-nav.prev {
    left: -60px;
}

.slider-nav.next {
    right: -60px;
}

/* ===== Why Choose Us ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing-unit) * 4);
}

.feature-card {
    text-align: center;
    padding: calc(var(--spacing-unit) * 4);
}

.feature-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto calc(var(--spacing-unit) * 3);
    background-color: var(--light-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--accent-gold);
    border: 3px solid var(--accent-gold);
}

.counter {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: calc(var(--spacing-unit) * 2) 0;
}

/* ===== Contact Form ===== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(var(--spacing-unit) * 6);
    margin-top: calc(var(--spacing-unit) * 4);
}

.contact-form {
    background-color: var(--white);
    padding: calc(var(--spacing-unit) * 5);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.form-group label {
    display: block;
    margin-bottom: calc(var(--spacing-unit) * 1);
    font-weight: 500;
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: calc(var(--spacing-unit) * 2);
    border: 2px solid var(--light-gray);
    border-radius: var(--border-radius);
    font-family: 'Open Sans', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-gold);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-error {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: calc(var(--spacing-unit) * 0.5);
    display: none;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: #dc3545;
}

.form-group.error .form-error {
    display: block;
}

.form-success {
    background-color: #d4edda;
    color: #155724;
    padding: calc(var(--spacing-unit) * 2);
    border-radius: var(--border-radius);
    margin-bottom: calc(var(--spacing-unit) * 3);
    display: none;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 3);
}

.info-card {
    background-color: var(--white);
    padding: calc(var(--spacing-unit) * 4);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.info-card h3 {
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--primary-color);
}

.info-card p,
.info-card a {
    color: var(--dark-gray);
    margin-bottom: calc(var(--spacing-unit) * 1);
}

.map-container {
    height: 400px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* ===== FAQ Accordion ===== */
.faq-categories {
    display: flex;
    justify-content: center;
    gap: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 4);
    flex-wrap: wrap;
}

.faq-category-btn {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
    background-color: var(--light-gray);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.faq-category-btn:hover,
.faq-category-btn.active {
    background-color: var(--primary-color);
    color: var(--white);
}

.faq-item {
    background-color: var(--white);
    border-radius: var(--border-radius);
    margin-bottom: calc(var(--spacing-unit) * 2);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq-question {
    padding: calc(var(--spacing-unit) * 3);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-question:hover {
    background-color: var(--light-gray);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    transition: var(--transition);
}

.faq-item.active .faq-question::after {
    content: '−';
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 1000px;
}

.faq-answer-content {
    padding: 0 calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 3);
    color: var(--dark-gray);
}

/* ===== Footer ===== */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: calc(var(--spacing-unit) * 6) 0 calc(var(--spacing-unit) * 2);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing-unit) * 4);
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.footer-section h3 {
    color: var(--white);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: calc(var(--spacing-unit) * 1);
    display: block;
}

.footer-section a:hover {
    color: var(--accent-gold);
}

.footer-bottom {
    text-align: center;
    padding-top: calc(var(--spacing-unit) * 4);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ===== Back to Top Button ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--accent-gold);
    color: var(--primary-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.5rem;
    box-shadow: var(--shadow-hover);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--accent-orange);
    color: var(--white);
    transform: translateY(-5px);
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 5);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-close {
    position: absolute;
    top: calc(var(--spacing-unit) * 2);
    right: calc(var(--spacing-unit) * 2);
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--dark-gray);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--accent-orange);
}

/* ===== Loading Animation ===== */
.loading {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.loading.loaded {
    opacity: 1;
}

/* ===== Utility Classes ===== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: calc(var(--spacing-unit) * 1); }
.mt-2 { margin-top: calc(var(--spacing-unit) * 2); }
.mt-3 { margin-top: calc(var(--spacing-unit) * 3); }
.mt-4 { margin-top: calc(var(--spacing-unit) * 4); }

.mb-1 { margin-bottom: calc(var(--spacing-unit) * 1); }
.mb-2 { margin-bottom: calc(var(--spacing-unit) * 2); }
.mb-3 { margin-bottom: calc(var(--spacing-unit) * 3); }
.mb-4 { margin-bottom: calc(var(--spacing-unit) * 4); }

.hidden {
    display: none;
}

.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border-width: 0 !important;
    clip-path: inset(50%) !important;
}